Sharpening machine for shears



June 19, 1923. 1,459,580 0. F. DOWNEY ET AL SHARPENING MACHINE FOR SHEARS Filed Sept. 14. 1922 Patented dune 19, 1923.

; n it a r OSCAR F. DOWNEY Ann CYBIL L. Benson, onci-rnsTNUT, ILLINOIS.

SHABPENING MACHINE non SI-HEARS.

Application filed September 14, 1922. SeriaiNo. 588,155.

T 0 all whom it may concern:

Be it known that we, OSCAR F. DOWNEY, and CYRIL L. BENSON, citizens of the United States, residing at Chestnut, in the county of Logan, State of Illinois, have invented a new a d useful Sharpening Machine for Shears; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to shear sharpening machines and has for its object to provide a device of this character comprising a base, upwardly extending clamping member for holding a shear blade and a reciprocating member having a grinding element disposed above the clamp. One end of the reciprocating member extends through a vertically rockable guide member, which guide member is horizontally disposed and pivotally mounted in the upper end of a vertically disposed rotatable shaft thereby forming a universal support whereby the reciprocating member may be moved transversely or vertically.

A further object is to mount the vertically disposed shaft in a sleeve carried by the base and to provide means whereby said shaft may be adjusted upwardly or downwardly and held in adjusted position so that the same may rotate. Also to provide the spring member extending through an opening in one side of the sleeve and adapted to be received in any of a plurality of annular channels in the shaft for holding the shaft in various vertical positions, at the same time allowing the shaft to rotate.

A further object is to provide a quickly adjustable standard for a shear sharpening machine, and to render more practicable to adjusting means set forth in our application Ser. No. 566,185, filed June 5th, 1922.

With the above and other objects in View the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawing, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawing:

Figure 1 is a side elevation of the shear sharpening machine.

Figure 2 is a vertical longitudinal sectional viewthrough the forward end'of the machine, showing the adjustable rod guide; F igure 3 is a vertical transverse sectional view through the machine taken on line 3-3 of Figure l.

Figure 4 is a horizontalsectional View. through the rod supporting post taken on llIlGHOf Figure 3. I

Referring to the drawing, the numeral *1 designates the base of the shear'sharpening machine, 2 an upwardly extending arm which terminates in a j aw 3, and between the aw 3 and a clamping jaw-'4; the bla dejfi of a pen of shears-is securely held. The

p g jaw e is provided with a downwardly extending arm 6, the lowerend of which is provided with a lug 7, which extends through an aperture Sin the arm 2, which forms a pivotal point'for the arm The arm 6 and the jaw .41: are forced inwardly bymeans of the cam lever 9 whichextends through the arms 6 and'2 and isprovided with a thumb nut 10. i i l Extending upwardly from the forward end 11 of the base l'is a sleeve 12 and ro tatably mounted in said sleeve is a vertically disposed shaft 13, which shaft is pro-' vided with a plurality of annular grooves 14:. The shaft 13 is held in various vertical adjusted positions by means of the transversely disposed portions 15 of the spring arm 16, which spring arm is anchored to the base 1 at 17 and is provided with a convolution 18, thereby allowing a great range of movement of the spring arm 16 when the transversely disposed portion 15 thereof is moved outwardly out of the transversely disposed slot 19 in the sleeve 12 for adjusting the rotatable vertical shaft 13 to a dif ferent position. It will be seen that the shaft 13 is free to rotate and that the portlon 15 of the spring arm 16 will prevent the shaft from upward or downward movement, thereby allowing the reciprocating sharpening frame to be moved from side to side by the operator so that the abrading member may be moved to various positions on the blade 3. The reciprocating member 20 is provided with a guide rod 22, the for- Ward end of which guide rod is slidably ported and conse'qii'ently by adjustifi the shaft 18 to various positions the sharpening hevel of the blade 3 may be varied accordmg to the edge desired or according to the angle of the edge. It will also be seen that when the operator grasps the handle 26 that he has complete control of the reciprocating member 20 in its vertical or side- Wise movement, and eohseqiiently posison the abrading member 21 anywhere on theb'l'ade of the shears as Well as vary the preset ire thereon. It Will' als o te tes that the hearing block 24 may be easily quickly adjusted npwardly and downwardly by simply pulling oiitvvardlv on the portion 15 of the spring arm ltiand moving the shaft 13 to the desired position and allowing the portion 15 to move under the influence of the spring arm 16 into engagement with one of the annular channels 14 or the Shae '13.

1 ,Mi u -5 :ln- "if v The nventlor having been set forth What is nevv and useful is i I A 1m 1. The comh1nat10n ltlr a shear sharpening mach ne compr sing a base, a stone carrying frame disposed above said b ase la shear clamp carried bythe lo'ase and p osed b eneath the frame, said frame p evide .i i l a snide, ro cine a, r universally supporting said guide r0 l as the frame is reciprocated, said means compris} ing a vertically disposed sleeve carriedgby the base, a rotatable vertically disposed 'h v I... of two subscribin carried by the u per end of the shaft and in a bearing of which the guide rock is slidably mounted.

I 2.. 'lh combination With a mandally opembed shear sharpening machine having a reciprocating frame guided at one end by a guide rod, of means for supporting said guide rod, said means comprising a vertically disposed fl sleeve, a rotatable: shaft m oumedln said, sleeve and vertically dis-' pqsed a horizontally disposed pivoted ear mg block carried by the iip'per' end of the shaft and in a bearing of which the guide ro'd slidably mounted and a spring member extending throligh an opening th'e sleeve and adapted to be received ann 'ilar grooves lathe shaft, for holding said shaft in various vertically adjusted positien'sg My V testimony jvhr'eof we have signed o'iii" frames to this specification in the presence 'g witnes'ses. v

OSCAR F. DOYVNEY. CYRIL L. BENsoN. Witnesses; i

' W. G. SMITH;

J. McFA'Y'DEfi. 

